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【简答题】
设x 1 ，x 2 是一元二次方程 3 x 2 +6x- 9 2 =0 的两实数根，不解方程，求下列各式的值． （1）x 1 2 -x 2 +x 1 -x 2 2 （2）|x 1 -x 2 |
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【简答题】如下图所示的电 路中,已知电源电动势E1=42V、E2=21V,电阻R1=12Ω、R2=3Ω、R3=6Ω,求各电阻中的电流。
【单选题】The interviewee says that the job of an architect is ______.
A.
more theoretical than practical
B.
to produce sturdy, well-designed buildings
C.
more practical than theoretical
D.
to produce attractive, interesting buildings
【多选题】What are the customs of celebrating Spring Festival?
A.
Visiting friends and relatives
B.
Wearing Red
C.
Enjoying the moon
D.
Setting off firecrackers
【多选题】What are the customs of Mid-Autumn Festival?
A.
Dancing.
B.
Eating moon-cake.
C.
Singing.
D.
Enjoying the moon.
【判断题】Comity is not law because countries do not regard it as something they are required to respect.
A.
正确
B.
错误
【多选题】What are the customs of celebrating Spring Festival?
A.
Dragon Boat Racing
B.
Hanging calamus and mugwort leaves
C.
Enjoying the moon
D.
Drink realgar wine
【简答题】What are the customs of Spring Festival Celebrations?
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